Ever since its launch in November 2010, Blekko has been on a mission to eliminate spam and content farms from search results. The human-curated search engine, which is also known both for using actual mammals to edit search results and for its employ of slashtags for easy categorization, announced in March that it had banned over 1 million spammy domain names from its results. Using a new algorithm it calls "AdSpam", Blekko investigates the quality of a doman's content, as well as the type of ads it includes, to identify those of the lowest quality. Those that don't pass muster get the boot -- which should be music to any searcher's ears.